CVE-2025-53506

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-53506
Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other EOL versions may also be affected. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0 Issue Tracking Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/07/10/13
https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
History

04 Nov 2025, 22:16

Type Values Removed Values Added
References
  • () http://www.openwall.com/lists/oss-security/2025/07/10/13 -

03 Nov 2025, 20:19

Type Values Removed Values Added
References
  • () https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html -

29 Oct 2025, 12:15

Type Values Removed Values Added
Summary (en) Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue. (en) Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other EOL versions may also be affected. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.

08 Aug 2025, 13:15

Type Values Removed Values Added
Summary (en) Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue. (en) Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.

07 Aug 2025, 12:15

Type Values Removed Values Added
References () https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0 - Vendor Advisory, Issue Tracking, Mailing List () https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0 - Issue Tracking, Mailing List, Vendor Advisory
Summary (en) Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue. (en) Uncontrolled Resource Consumption vulnerability in Apache Tomcat if an HTTP/2 client did not acknowledge the initial settings frame that reduces the maximum permitted concurrent streams. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. Older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.

29 Jul 2025, 18:35

Type Values Removed Values Added
First Time Apache
Apache tomcat
CPE cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*
References () https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0 - () https://lists.apache.org/thread/p09775q0rd185m6zz98krg0fp45j8kr0 - Vendor Advisory, Issue Tracking, Mailing List

15 Jul 2025, 13:14

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-10 20:15

Updated : 2025-11-04 22:16

NVD link : CVE-2025-53506

Mitre link : CVE-2025-53506

CVE.ORG link : CVE-2025-53506

JSON object : View

Products Affected

apache

  • tomcat
CWE
CWE-400

Uncontrolled Resource Consumption